How does a continuous flow oxygen system operate for passengers?

How does a continuous flow oxygen system operate for passengers?

• A. It delivers oxygen continuously and uses a reservoir bag to collect oxygen during exhalation.
• B. It delivers oxygen only when the user inhales.
• C. It stores oxygen as liquid and feeds it via a venturi.
• D. It circulates cabin air through the mask.

Answer: (A)

A continuous-flow passenger oxygen system delivers oxygen at all times to the mask, and the reservoir bag stores some of that oxygen so it’s available for inhalation. Oxygen is continuously supplied through the mask, and the bag fills during exhalation. When you inhale, you draw from both the ongoing flow and the contents of the bag, providing a steady, high enough concentration of oxygen even if your breathing rate changes. This setup is simple and reliable for en-route oxygen needs. It isn’t a system that only delivers oxygen on inhalation, nor does it rely on liquid oxygen with a venturi, nor circulate cabin air through the mask.

A continuous-flow passenger oxygen system delivers oxygen at all times to the mask, and the reservoir bag stores some of that oxygen so it’s available for inhalation. Oxygen is continuously supplied through the mask, and the bag fills during exhalation. When you inhale, you draw from both the ongoing flow and the contents of the bag, providing a steady, high enough concentration of oxygen even if your breathing rate changes. This setup is simple and reliable for en-route oxygen needs.

It isn’t a system that only delivers oxygen on inhalation, nor does it rely on liquid oxygen with a venturi, nor circulate cabin air through the mask.